Issue #3585: Add pkg-config support.

It creates a python-2.7.pc file and a python.pc symlink in the
$(LIBDIR)/pkgconfig directory. Patch by Clinton Roy.

Makefile.pre.in

@@ -770,6 +770,8 @@ bininstall:	altbininstall
 	(cd $(DESTDIR)$(BINDIR); $(LN) python$(VERSION)$(EXE) $(PYTHON))
 	-rm -f $(DESTDIR)$(BINDIR)/python-config
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s python$(VERSION)-config python-config)
+	-rm -f $(DESTDIR)$(LIBPC)/python.pc
+	(cd $(DESTDIR)$(LIBPC); $(LN) -s python-$(VERSION).pc python.pc)
 
 # Install the interpreter with $(VERSION) affixed
 # This goes into $(exec_prefix)
@@ -946,8 +948,12 @@ inclinstall:
 # Install the library and miscellaneous stuff needed for extending/embedding
 # This goes into $(exec_prefix)
 LIBPL=		$(LIBP)/config
+
+# pkgconfig directory
+LIBPC=		$(LIBDIR)/pkgconfig
+
 libainstall:	all
-	@for i in $(LIBDIR) $(LIBP) $(LIBPL); \
+	@for i in $(LIBDIR) $(LIBP) $(LIBPL) $(LIBPC); \
 	do \
 		if test ! -d $(DESTDIR)$$i; then \
 			echo "Creating directory $$i"; \
@@ -974,6 +980,7 @@ libainstall:	all
 	$(INSTALL_DATA) Modules/Setup $(DESTDIR)$(LIBPL)/Setup
 	$(INSTALL_DATA) Modules/Setup.local $(DESTDIR)$(LIBPL)/Setup.local
 	$(INSTALL_DATA) Modules/Setup.config $(DESTDIR)$(LIBPL)/Setup.config
+	$(INSTALL_DATA) Misc/python.pc $(DESTDIR)$(LIBPC)/python-$(VERSION).pc
 	$(INSTALL_SCRIPT) $(srcdir)/Modules/makesetup $(DESTDIR)$(LIBPL)/makesetup
 	$(INSTALL_SCRIPT) $(srcdir)/install-sh $(DESTDIR)$(LIBPL)/install-sh
 	# Substitution happens here, as the completely-expanded BINDIR

Misc/ACKS

@@ -618,6 +618,7 @@ Saskia van Rossum
 Donald Wallace Rouse II
 Liam Routt
 Craig Rowland
+Clinton Roy
 Paul Rubin
 Sam Ruby
 Audun S. Runde

Misc/NEWS

@@ -971,6 +971,10 @@ Tools/Demos
 Build
 -----
 
+- Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
+  and a python.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
+  Clinton Roy.
+
 - Issue #6094: Build correctly with Subversion 1.7.
 
 - Issue #5847: Remove -n switch on "Edit with IDLE" menu item.

Misc/python.pc.in

@@ -0,0 +1,13 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Python
+Description: Python library
+Requires: 
+Version: @VERSION@
+Libs.private: @LIBS@
+Libs: -L${libdir} -lpython@VERSION@
+Cflags: -I${includedir}/python@VERSION@ 
+

configure.in

@@ -3867,7 +3867,7 @@ done
 AC_MSG_RESULT(done)
 
 # generate output files
-AC_CONFIG_FILES(Makefile.pre Modules/Setup.config)
+AC_CONFIG_FILES(Makefile.pre Modules/Setup.config Misc/python.pc)
 AC_OUTPUT
 
 echo "creating Modules/Setup"

pyconfig.h.in

@@ -5,6 +5,9 @@
 #define Py_PYCONFIG_H
 
 
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
 /* Define for AIX if your compiler is a genuine IBM xlC/xlC_r and you want
    support for AIX C++ shared extension modules. */
 #undef AIX_GENUINE_CPLUSPLUS
@@ -966,6 +969,28 @@
 /* Define to 1 if your <sys/time.h> declares `struct tm'. */
 #undef TM_IN_SYS_TIME
 
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+
+
 /* Define if you want to use MacPython modules on MacOSX in unix-Python. */
 #undef USE_TOOLBOX_OBJECT_GLUE
 
@@ -1006,20 +1031,21 @@
 /* Define to profile with the Pentium timestamp counter */
 #undef WITH_TSC
 
-/* Define to 1 if your processor stores words with the most significant byte
-   first (like Motorola and SPARC, unlike Intel and VAX). */
-#undef WORDS_BIGENDIAN
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
 
 /* Define if arithmetic is subject to x87-style double rounding issue */
 #undef X87_DOUBLE_ROUNDING
 
-/* Define to 1 if on AIX 3.
-   System headers sometimes define this.
-   We just want to avoid a redefinition error message.  */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-
 /* Define on OpenBSD to activate all library features */
 #undef _BSD_SOURCE
 
@@ -1038,15 +1064,25 @@
 /* This must be defined on some systems to enable large file support. */
 #undef _LARGEFILE_SOURCE
 
+/* Define to 1 if on MINIX. */
+#undef _MINIX
+
 /* Define on NetBSD to activate all library features */
 #undef _NETBSD_SOURCE
 
 /* Define _OSF_SOURCE to get the makedev macro. */
 #undef _OSF_SOURCE
 
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+#undef _POSIX_1_SOURCE
+
 /* Define to activate features from IEEE Stds 1003.1-2001 */
 #undef _POSIX_C_SOURCE
 
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
+
 /* Define if you have POSIX threads, and your system does not define that. */
 #undef _POSIX_THREADS
 
@@ -1054,12 +1090,12 @@
 #undef _REENTRANT
 
 /* Define for Solaris 2.5.1 so the uint32_t typedef from <sys/synch.h>,
-   <pthread.h>, or <semaphore.h> is not used. If the typedef was allowed, the
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
    #define below would cause a syntax error. */
 #undef _UINT32_T
 
 /* Define for Solaris 2.5.1 so the uint64_t typedef from <sys/synch.h>,
-   <pthread.h>, or <semaphore.h> is not used. If the typedef was allowed, the
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
    #define below would cause a syntax error. */
 #undef _UINT64_T